I wanted to take a cool pic from the interior of a building through the door, illuminated through the window. It wasn't cool but hot, the pic turned out blurred (I deleted it) and the window turned out melted (I didn't delete it, though. It's still usable.)

Bye
Jojo

This is just the sort of nonsense up with which I will not put.Winston Churchill

I've done the same as Jojo with a desk lamp. In lighting this scene:
I built an enclosed room and held the desklamp up to a hole in the ceiling. The scene worked great but unfortunately I melted a few bricks in the process.

X-mas lights are cool enough to the touch, so I would say that they are safe to use with your LEGO. If you're still worried about it, check out a craft store, where they should have strings of even smaller, lower wattage bulbs that run on a couple of AA batteries.

"Always do what you want, and say what you feel, because those who mind don't matter, and those who matter don't mind." ~ Doctor Suess

you know awhile back (ok a long while back) i had had the idea to make landing strips by using the road plates and some flashing lights (like you put on a tree during yule season). I was going to drill holes in the baseplates, and tape them into the holes..
fortunately I came to my senses in time.